#include<stdio.h>
int main()
{
	char c1, c2;
	c1 = 'a';
	c2 = 'b';
	c1 = c1 + 10;
	c2 = c2 - c1 + 10;
	printf("%c,%d\n%c,%d",c1,c1,c2,c2);
}